// Copyright (C) 2024 EA group inc.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
//
// This file is a Posix-specific part of spinlock_wait.cc

#include <sched.h>

#include <atomic>
#include <ctime>

#include <turbo/base/internal/errno_saver.h>
#include <turbo/base/internal/scheduling_mode.h>
#include <turbo/base/macros.h>

extern "C" {

TURBO_WEAK void TURBO_INTERNAL_C_SYMBOL(TurboInternalSpinLockDelay)(
    std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, int loop,
    turbo::base_internal::SchedulingMode /* mode */) {
  turbo::base_internal::ErrnoSaver errno_saver;
  if (loop == 0) {
  } else if (loop == 1) {
    sched_yield();
  } else {
    struct timespec tm;
    tm.tv_sec = 0;
    tm.tv_nsec = turbo::base_internal::SpinLockSuggestedDelayNS(loop);
    nanosleep(&tm, nullptr);
  }
}

TURBO_WEAK void TURBO_INTERNAL_C_SYMBOL(TurboInternalSpinLockWake)(
    std::atomic<uint32_t>* /* lock_word */, bool /* all */) {}

}  // extern "C"
